18225258 has 32 divisors (see below), whose sum is σ = 38833344. Its totient is φ = 5682432.

The previous prime is 18225257. The next prime is 18225271. The reversal of 18225258 is 85252281.

It is not an unprimeable number, because it can be changed into a prime (18225257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19641 + ... + 20547.

It is an arithmetic number, because the mean of its divisors is an integer number (1213542).

Almost surely, 2^18225258 is an apocalyptic number.

18225258 is an abundant number, since it is smaller than the sum of its proper divisors (20608086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18225258 is a wasteful number, since it uses less digits than its factorization.

18225258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its digits is 12800, while the sum is 33.

The square root of 18225258 is about 4269.1050584402. The cubic root of 18225258 is about 263.1628382384.

The spelling of 18225258 in words is "eighteen million, two hundred twenty-five thousand, two hundred fifty-eight".